Thats how its done in Ireland, you take 6 subjects for the last 2 years of secondary school (everyone has to take English, Irish and Maths) and most Universities want you to have a foreign language. You are awarded points on a scale up to 100 (A1 100 points, A2 90 points, A3 85 points, B1 80 points etc) per subject and college places are allocated on that score. No essays, no interviews etc.
I also did the UK admission process that isn't blind like the Irish one, interviews, essays etc and the blind one is so much better.
Wealthy people are still able to have advantages like send their children to private schools etc, get extra tuition but its nowhere near how americans are able to get their children into college, you still have to get there on academic ability